A project for improving a billing process has the following precedence relationships and activity times:

Activity	Activity Time (weeks)	Immediate Predecessor(s)
A	2
B	8
C	5	A
D	12	B, C
E	11	B
F	4	D
G	3	E
H	9	F, G

Calculate the slack for each activity. Which activities are on the critical path?

Activity	Activity Time (weeks)	On critical path? Yes/No	Slack (weeks)
A	2
B	8
C	5
D	12
E	11
F	4
G	3
H	9